How to change from alltel to verizon?

[vdubbin]

I'm new and have been searching this site and xda to figure out how or if I can unlock my sisters Alltel Diamond to use as a verizon phone. She recently joined my verizon account from alltel and has lost the use of her diamond, even though someone at verizon thought we could switch her phone over without a problem, which wasn't the case, after the matter of course...

If anyone could point me in the correct direction, I would appreciate it! I couldn't tell if the "unlocking" term you guys reference about flashing new rom's and radio's would allow me to change the phone to verizon.

Thanks!